Add missing mailer for quote notifications (#35652)

app/models/notification.rb

@@ -30,6 +30,7 @@ class Notification < ApplicationRecord
     'FollowRequest' => :follow_request,
     'Favourite' => :favourite,
     'Poll' => :poll,
+    'Quote' => :quote,
   }.freeze
 
   # Please update app/javascript/api_types/notification.ts if you change this

app/models/user_settings.rb

@@ -43,6 +43,7 @@ class UserSettings
     setting :reblog, default: false
     setting :favourite, default: false
     setting :mention, default: true
+    setting :quote, default: true
     setting :follow_request, default: true
     setting :report, default: true
     setting :pending_account, default: true